Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2016-20012

Published: Sep 15, 2021 | Modified: Nov 21, 2024
CVSS 3.x
5.3
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
5.9 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Ubuntu
NEGLIGIBLE
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-20012
CWEhttps://cwe.mitre.org/data/definitions/NVD-Other.html

OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product

Affected Software

NameVendorStart VersionEnd Version
OpensshOpenbsd*8.7 (including)
OpensshUbuntubionic*
OpensshUbuntudevel*
OpensshUbuntuesm-infra-legacy/trusty*
OpensshUbuntuesm-infra/bionic*
OpensshUbuntuesm-infra/focal*
OpensshUbuntuesm-infra/xenial*
OpensshUbuntufips-updates/bionic*
OpensshUbuntufips-updates/focal*
OpensshUbuntufips-updates/xenial*
OpensshUbuntufips/bionic*
OpensshUbuntufips/focal*
OpensshUbuntufips/xenial*
OpensshUbuntufocal*
OpensshUbuntuhirsute*
OpensshUbuntuimpish*
OpensshUbuntujammy*
OpensshUbuntutrusty*
OpensshUbuntutrusty/esm*
OpensshUbuntuupstream*
OpensshUbuntuxenial*
Openssh-ssh1Ubuntubionic*
Openssh-ssh1Ubuntudevel*
Openssh-ssh1Ubuntuesm-apps/bionic*
Openssh-ssh1Ubuntuesm-apps/focal*
Openssh-ssh1Ubuntuesm-apps/jammy*
Openssh-ssh1Ubuntufocal*
Openssh-ssh1Ubuntuhirsute*
Openssh-ssh1Ubuntuimpish*
Openssh-ssh1Ubuntujammy*
Openssh-ssh1Ubuntuupstream*

References

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